r/COVID19 is a subreddit with 600k members. The community frequently discusses covid, vaccine, covid 19, long covid, and vaccination, and the most common flair used is academic report, general, preprint, vaccine research, and discussion thread.
In December 2019, SARS-CoV-2 emerged in the city of Wuhan, China. This subreddit seeks to facilitate scientific discussion of this potential global public health threat. We have very strict rules. Please make sure to read them before posting or commenting. Moderators may lock or remove comments or posts at their discretion.
Popular Topics in r/COVID19
#1
Covid
: "Repeated Covid-19 vaccine boosters elicit variant-specific memory B cells in humans"
294 posts
#2
Vaccine
: "Moderna Announces Updated COVID-19 Vaccine Against LP.8.1 Variant Generates Strong Immune Response in Humans"
107 posts
#3
Covid 19
: "COVID-19 mRNA Vaccination and 4-Year All-Cause Mortality Among Adults Aged 18 to 59 Years in France"
52 posts
#4
Long Covid
: "Circulating Microclots Are Structurally Associated With Neutrophil Extracellular Traps and Their Amounts Are Elevated in Long Covid Patients"
48 posts
#5
Vaccination
: "COVID-19 mRNA Vaccination and 4-Year All-Cause Mortality Among Adults Aged 18 to 59 Years in France"
24 posts
#6
Research
: "Long-persisting SARS-CoV-2 spike-specific CD4+ T cells associated with mild disease and increased cytotoxicity post COVID-19"
24 posts
#7
Sars Cov 2
17 posts
#8
Symptoms
: "Association Between Vitamin D Levels and Long COVID Signs and Symptoms"
16 posts
#9
Mrna
: "Effectiveness of a Mrna Vaccine Booster Dose Against COVID-19 Among Oregon Healthcare Personnel, January 2021 – June 2023"
15 posts
#10
Lab Leak
13 posts
Flair Used in r/COVID19
#1
Academic Report
: "Association between COVID-19 vaccination and sudden death in apparently healthy younger individuals: A population-based case-control study"
50 posts
#2
General
: "Why covid-19 is “a vascular disease masquerading as a respiratory one”"
49 posts
#3
Preprint
: "Repeated COVID-19 vaccine boosters elicit variant-specific memory B cells in humans"
25 posts
#4
Vaccine Research
: "Stanford Medicine study shows why mRNA-based COVID-19 vaccines can cause myocarditis"
22 posts
#5
Discussion Thread
: "Monthly Scientific Discussion Thread - January 2026"
12 posts
#6
Observational Study
: "Ophthalmic complications associated with COVID-19: a large US national database analysis"
10 posts
#7
Academic Comment
: "Why scientists are rethinking the immune effects of SARS-CoV-2"
7 posts
#8
Press Release
: "Moderna Announces Updated COVID-19 Vaccine Against LP.8.1 Variant Generates Strong Immune Response in Humans"
4 posts
#9
Molecular/Phylogeny
: "Haptoglobin Phenotypes Stratify Post-Exertional Cognitive Dysfunction Associated with Altered Cerebral Oxygenation and Metabolic Signatures in Long COVID"
3 posts
#10
Clinical
: "Circulating Microclots Are Structurally Associated With Neutrophil Extracellular Traps and Their Amounts Are Elevated in Long COVID Patients"
2 posts
Member Growth in r/COVID19
Yearly
-2280 members(-0.4%)
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About
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This page gives a focused view of r/COVID19, including current member size, discussion patterns, product reviews, and related communities to explore.
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Last updated: August 13, 2026